71253526529 has 2 divisors, whose sum is σ = 71253526530. Its totient is φ = 71253526528.

The previous prime is 71253526511. The next prime is 71253526549. The reversal of 71253526529 is 92562535217.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52872403600 + 18381122929 = 229940^2 + 135577^2 .

It is a cyclic number.

It is not a de Polignac number, because 71253526529 - 2⁸ = 71253526273 is a prime.

It is not a weakly prime, because it can be changed into another prime (71253526549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35626763264 + 35626763265.

It is an arithmetic number, because the mean of its divisors is an integer number (35626763265).

Almost surely, 2^71253526529 is an apocalyptic number.

It is an amenable number.

71253526529 is a deficient number, since it is larger than the sum of its proper divisors (1).

71253526529 is an equidigital number, since it uses as much as digits as its factorization.

71253526529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 47.

The spelling of 71253526529 in words is "seventy-one billion, two hundred fifty-three million, five hundred twenty-six thousand, five hundred twenty-nine".